Dimension 8200 HDD Size Limits

Windows needs Registry hacks to support 48 bit LBA aka bigger than 127 gigs drive.

The Maxtor Big Drive Enabler does this.

It patches windows so its not Drive Vendor specific aka it works on anyones drive.

http://www.maxtor.com/en/support/downloads/big_drive_enabler.htm

There are more complicated tricks if you want to Pre install onto a large partition.

http://support.microsoft.com/default.aspx?scid=303013

By default, the original release version of Windows XP Home Edition and of Windows XP Professional do not have 48-bit LBA support. Your computer must meet the following requirements to use 48-bit LBA ATAPI support: • 48-bit LBA-compatible BIOS.
• 137-GB hard disk or larger.
• You must have Windows XP SP1 installed.
For the original release version of Windows XP Home Edition or of Windows XP Professional, you can enable 48-bit LBA for testing purposes. To do this, set the EnableBigLba registry value to 1 in the following registry subkey:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Atapi\Parameters\
Warning Data corruption may occur if either of the following conditions is true:• You use this registry value to enable 48-bit LBA support in the original release version of Windows XP Home Edition or of Windows XP Professional.
• You install an earlier version of Windows on a disk partition that was previously created by a 48-bit aware operating system, such as Windows XP SP1. And that disk partition is equal to or larger than the current addressable limit of 137 GB.